Release flag. Add diagnostics

compiler/testData/javaModules/releaseFlag/moduleSwing/foo/Foo.kt

@@ -0,0 +1,6 @@
+package foo;
+
+public class Foo {
+    //no requirement
+    val z: javax.swing.JFrame? = null
+}

compiler/testData/javaModules/releaseFlag/moduleSwing/foo/Foo2.java

@@ -0,0 +1,3 @@
+package foo;
+
+public class Foo2 {}